Adjunctive therapy of phenytoin overdose--a case report using plasmaphoresis.

Phenytoin is widely used as an anticonvulsant. In overdose situations phenytoin demonstrates saturable metabolic kinetics making treatment difficult. Phenytoin's high protein binding makes it a poor candidate for hemodialysis or hemoperfusion. We report a case of an attempted suicide in which plasmaphoresis was used in an attempt to lower plasma levels and reduce toxicity. A review of the use of plasmaphoresis in acute intoxications is included.